LASER BEAM WELDING DEVICE

摘要

PROBLEM TO BE SOLVED: To surely execute the welding having good quality by arranging a contact disk rotated in the advancing direction of a laser beam machining head while pressing the vicinity of the irradiated part with a laser beam on a work along a laser beam condensing angle. SOLUTION: The contact disk 7 rotated in the advancing direction of the laser beam machining head while pressing near the focus point 6 of a laser beam 5 to the work W, is supported with supporting legs 9 fixed to a holder 2 through supporting shafts 10. As the contact disk 7, a round disk cooted with molybdenum or a machined molybdenum round disk is suitable and the disk is disposed in a faced V-shape so as to interpose the laser beam 5 at the mutually different angles along the beam condensing angle of the laser beam 5. The pressing point 8 on the contact disk 7 to the work W is offset in the advancing direction of the laser beam machining head in a distance larger than the diameter of the focus point 6 of the laser beam 5 and the surrounding of the welding position with the laser beam is shielded with inert gas through a shield gas nozzle 11.